Royal Appliance Air Furnace Manual De Usuario

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29733 R2  06/01/2003
 
15
 
THE BELT DRIVE COMPONENTS OPERATE AT 
HIGH SPEEDS AND CAN EASILY SNAG LOOSE 
CLOTHING, CAUSING SERIOUS PERSONAL 
INJURY. THIS PROCEDURE SHOULD BE LEFT TO  
TRAINED SERVICE PERSONNEL. 
 
If the blower RPM operates above 1000 RPM, it is 
advisable to replace the sintered bronze blower bearings 
with roller Bearings. 
 
The circulating fan start-up is delayed 30 or 45 seconds 
(depending on EFT) in the heating mode. 
 
The circulating fan start-up is delayed 30 seconds in the 
cooling mode. The “fan off” is delayed 30 seconds in the 
cooling mode. 
 
The “fan off” delay may be field adjusted by manipulating 
the dipswitches. See Figures 8. 
 
Figure 8: Heating Mode “Blower Off” Timings, ST9103 
 
 
 
DISCONNECT THE POWER SUPPLY TO THE 
FURNACE BEFORE OPENING THE BLOWER 
ACCESS DOOR TO SERVICE THE AIR FILTER, FAN 
AND MOTOR. FAILURE TO SHUT OFF POWER 
COULD ALLOW THE BLOWER TO START 
UNEXPECTEDLY, CREATING A RISK OF DEATH 
OR PERSONAL INJURY. 
 
Do not use the blower speed wires as a source of 
power to accessories as electronic air cleaners and 
humidifier transformers. The unused motor taps 
auto-generate sufficiently high voltages to damage 
accessory equipment. Use the terminals provided on 
the ST9103 EFT  
 
 
DO NOT START THE BURNER OR BLOWER FAN 
UNLESS THE BLOWER ACCESS DOOR IS 
SECURELY IN PLACE. 
Additional ST9103 Fan Timer Control information is in 
Appendix A, Tables, and in Appendix B, Wiring 
Diagrams. 
 
19.  MAINTENANCE AND SERVICE 
A: Routine Maintenance By Home Owner 
 
Other than remembering to arrange for the annual 
professional servicing of the furnace by the service or 
installation contractor, the most important routine service 
performed by the homeowner is to maintain the air filter 
or filters. A dirty filter can cause the furnace to over-heat, 
fail to maintain indoor temperature during cold weather, 
increase fuel consumption and cause component failure. 
The furnace filter(s) should be inspected, cleaned or 
replaced monthly. The furnace is factory equipped with a 
semi-permanent type filter. If the filter is damaged, 
replace with filters of the same size and type.  
 
During the routine service, inspect the general condition 
of the furnace watching for signs of oil leaks in the vicinity 
of the oil burner, soot forming on any external part of the 
furnace, soot forming around the joints in the vent pipe, 
etc. If any of these conditions are present, please advice 
your service or installation contractor.